/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/AbilitySystemBlueprintLibrary.h
Helper function that may be useful to call from native as well
static float GetModifiedAttributeMagnitude ( const [FGameplayEffectSpec](API\Plugins\GameplayAbilities\FGameplayEffectSpec) & SpecHandle, [FGameplayAttribute](API\Plugins\GameplayAbilities\FGameplayAttribute) Attribute )